{"uid":"cap_ip5M6Dhn74px5CHjuq4cf","slug":"api-carbon-cashmere-de-5e6e1bd1","name":"Bitcoin Mempool Pressure Classifier","description":"Bitcoin mempool pressure classification (low/medium/high/extreme) + fee buckets (0-1, 1-2, 2-5, 5-10, 10-20, 20-50, 50-100, 100-200, 200+ sat/vB) + RBF count + CPFP candidate count. Updated every 5 min.","url":"https://api.carbon-cashmere.de/v1/btc-derivatives/mempool-pressure","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"rbf_pct":4,"pressure":"low","tx_count":3075,"rbf_count":124,"mempool_mb":0.87,"cpfp_candidates":87,"fee_buckets_sat_vb":{"0_1":1240,"1_2":880,"2_5":412}}},"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{}}},"response":{"ts":"2026-05-25T04:31:41.339823+00:00","rbf_pct":72.8,"pressure":"low","tx_count":756,"rbf_count":348,"mempool_mb":0.24,"cpfp_candidates":240,"avg_ancestor_count":6.7,"fee_buckets_sat_vb":{"0_1":4,"1_2":364,"2_5":98,"5_10":7,"10_20":4,"20_50":0,"50_100":1,"100_200":0,"200_plus":0},"min_relay_fee_sat_vb":1}},"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_PilBljr3ThFcJJu-0QQFg","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns Bitcoin mempool pressure level (low/medium/high/extreme), fee bucket distribution by sat/vB, RBF count/percentage, CPFP candidate count, and total tx count — updated every 5 minutes.","exampleAgentPrompt":"What's the current Bitcoin mempool pressure right now — is it low, medium, high, or extreme — and how are transactions distributed across the fee buckets like 1-2 sat/vB or 5-10 sat/vB?","exampleUseCases":null,"resultDescription":"A JSON object with: pressure classification string (low/medium/high/extreme), total tx_count in mempool, mempool_mb (size in megabytes), rbf_count and rbf_pct (RBF transaction count and percentage), cpfp_candidates count, avg_ancestor_count, min_relay_fee_sat_vb, a fee_buckets_sat_vb object with counts across 9 fee ranges (0-1, 1-2, 2-5, 5-10, 10-20, 20-50, 50-100, 100-200, 200+ sat/vB), and a timestamp. Data is refreshed every 5 minutes.","failureModes":["Stale data if the 5-minute refresh cycle is delayed — ts field indicates data age","Service unavailable (5xx) if the underlying Bitcoin node connection fails","Rate limiting or payment failure if x402 payment is not correctly handled","Empty or zero counts during periods of extremely low mempool activity"],"whenToPreferThis":"Use this endpoint when you need a quick, pre-classified mempool congestion signal plus fee-band distribution without running your own Bitcoin node. Ideal for agents deciding whether to broadcast a transaction now or wait, setting fee rates, or alerting users to congestion spikes. Prefer over raw mempool APIs when you need a human-readable pressure label and bucketed fee histogram in a single call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:46:58.430Z","isFirstParty":false}